When the north pole of a bar magnet is moved into a solenoid, the needle on a galvanometer attached to the solenoid moves to the left, indicating that a current is produced. The magnet is then pulled out at a faster speed. What will be the result?

Pulling the magnet out reverses the change in magnetic flux through the solenoid, so the induced current flows in the opposite direction from when the north pole was moved in. Pulling it out faster makes the flux change more quickly, producing a larger induced current. Therefore, the result is a larger current in the opposite direction.

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